EPScript/Operators

Operators

Logical Operators

and

Returns true if both the left-hand and the right-hand expressions return true.

<if test="type = 'book' and is_set( creators )">
...
</if>

or

Returns true if at least one of the expressions returns true.

<if test="type = 'book' or type = 'patent'">
...
</if>

not

Returns true if the expression is false and false if the expression is true.

<if test="!is_set( creators )">
...
</if>

Comparison Operators

lt

Returns true if the left-hand expression is less than the right-hand expression. This is only applicable to expressions that return numeric values.

<if test="length(editors) lt 6">
...
</if>

gt

Returns true if the left-hand expression is greater than the right-hand expression. This is only applicable to expressions that return numeric values.

<if test="length(editors) gt 1">
...
</if>

equals

Returns true if the left-hand expression is equal to the right-hand expression. This applies to numeric, boolean, and string values.

<if test="type = 'patent'">
...
</if>

not equals

The inverse of the equals operator, this returns true if the expressions are not equal.

<if test="type != 'book'">
...
</if>